That's how long we have to climb the fence, assuming the bomb doesn't spontaneously combust, then we still have to get to the tether, set the explosive, and hope the charge is strong enough to actually cut it.
itu lamanya kita harus memanjat pagarnya, kita asumsikan bom tidak tiba-tiba terbakar, maka kita masih harus mencapai pembatas, memasang peledak, dan semoga tekannya cukup kuat untuk benar-benar memotongnya.